Raspberry pi + Arduino or just Raspberry pi?

Hi, I am planning to start with robotics. I want build simple robots powered by a neural network for e.g. image recognition (I have background in ML). I recently got told that an Arduino isn’t enough for ML and that I should buy a Raspberry pi. I also recently found an article where someone built a neural network powered robot using both arduino and raspberry pi. He used raspberry pi for most of the stuff and then sent signals from it to arduino which controlled the motors. Can raspberry pi alone control the motors? What is the advantage of using arduino together this raspberry pi?

Thanks in advance 😉

submitted by /u/everek123
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